protected override void OnElementDetaching(
IFrameworkInputElement element)
{
var frameworkElement = element.As <FrameworkElement>();
HintAssist.SetInputDataAdapter(frameworkElement, null);
frameworkElement.Loaded -= OnLoaded;
element.GotKeyboardFocus -= OnGotKeyboardFocus;
element.LostKeyboardFocus -= OnLostKeyboardFocus;
element.PreviewTextInput -= OnPreviewTextInput;
}
protected override void OnElementAttaching(
IFrameworkInputElement element)
{
var frameworkElement = element.AsOrDefault <FrameworkElement>();
if (frameworkElement == null)
{
throw new NotSupportedException(
$"Cannot host a {nameof(TextFieldInputVisualStateService).SQuote()} on the type " +
$"{element.GetType().Name.SQuote()} because it must be assignable to the type " +
$"{nameof(FrameworkElement).SQuote()}.");
}
HintAssist.SetInputDataAdapter(frameworkElement, new TextFieldInputDataAdapter(element));
frameworkElement.Loaded += OnLoaded;
element.GotKeyboardFocus += OnGotKeyboardFocus;
element.LostKeyboardFocus += OnLostKeyboardFocus;
element.PreviewTextInput += OnPreviewTextInput;
}